Enhancement props setters and getters

[maxcapodi78]

All objects created and returned by pyaedt (setup, mesh, boundaries) return an object containing a dictionary named props.
Till now user that want to change an object in AEDT needs to do
object.props["propertyname"] = property_value
object.update()

From now on the props will be an automatic getter and setter for the property

[codecov]

Codecov Report

Merging #939 (2620f8e) into main (6d9ab07) will increase coverage by 0.05%.
The diff coverage is 85.96%.

@@            Coverage Diff             @@
##             main     #939      +/-   ##
==========================================
+ Coverage   80.20%   80.26%   +0.05%     
==========================================
  Files         128      128              
  Lines       37419    37623     +204     
==========================================
+ Hits        30013    30197     +184     
- Misses       7406     7426      +20